New data released this week shows that a new variant of COVID is spreading quickly across New Jersey a month after it was first detected in the state.

According to the U.S. Centers for Disease Control, the BA.2 variant has more than doubled in prevalence in a week.

It's not clear how much of an impact BA.2 will have on New Jersey.

The surge that hit New Jersey hard from mid-December through mid-January was caused by the highly transmissible omicron variant called BA.2.

It wasn't as easy to detect thestealth variant of BA.2 because it had a different genetic sequence. It was first detected in the U.S. and New Jersey.

How fast is BA.2 spreading in New Jersey?

In six weeks, BA.2 has spread quickly.

It made up 39% of the COVID strains in New Jersey and New York for the week ending on March 12.

The data in New Jersey's latest variant report is old. It uses test results from four weeks ago.

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Does BA.2 spread faster? Is it more lethal?

According to the World Health Organization, studies have shown that BA.2 is more transmissible than omicron BA.1.

If BA.2 causes severe illness the way omicron BA.1 did, there will be a rapid surge in cases, hospitalizations and deaths for a month before falling just as quickly.

More than 2,000 New Jerseyans died during the short peak of omicron BA.1, which was considered milder than the original strain and the delta variant.

We don't know until it's too late. Deaths are one of the last impacts we see.

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Is New Jersey seeing any impact?

It doesn't look like BA.2 is making a difference. Public health officials are watching its spread.

The key COVID metrics such as cases, hospitalizations and deaths have not changed much since the July surge.

COVID hospitalizations were at 438, intensive care admissions at 81 and ventilator use at 49 as of Tuesday night, a decrease of more than 90 percent since omicron peaked in mid-January.

On Tuesday, there were 559 new cases compared to a high of 33,459 on January 7.

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In March, deaths have been in the double digits and single digits, after being in the double digits for most days in January.

The governor lifted the last two state mask mandates in schools and public buildings in order to return to normal.

New Jersey health officials don't know what BA.2 will do.

It is difficult to predict how COVID-19 variant or any other emerging respiratory virus will evolve over time and what their specific impacts will be, according to Dr. Tina Tan, the state epidemiologist.

Are vaccines and natural immunity effective against BA.2?

British scientists found that vaccines were as effective against BA.2 as they were against omicron BA.1. The vaccines work well in fending off illness, but they don't prevent infections.

According to the World Health Organization, if you were exposed to omicron BA.1, you may have good protection against BA.2.

Studies suggest that an infection with BA.1 provides strong protection against reinfection.

The hundreds of thousands of infections in New Jersey during the omicron surge suggest that many residents may have some protection against BA.2, said Tan.

How does NJ compare to the rest of the US?

New Jersey and the rest of the Northeast were hit first with BA.2 and are currently ahead of the rest of the U.S.

39% of COVID cases are the BA.2 strain, compared to the U.S. average of 23.1%.

New England is close behind. California, Nevada and Arizona are third at 27.7%.

The percentage of BA.2 variant in different sections of the U.S. as of March 12. Region 2, which includes New Jersey and New York, leads the nation in BA.2 spread.
The percentage of BA.2 variant in different sections of the U.S. as of March 12. Region 2, which includes New Jersey and New York, leads the nation in BA.2 spread.

What's happening in other parts of the globe?

There has been a rise in cases in Europe and parts of Asia in the past few weeks.

The United Kingdom, the Netherlands, Germany, Switzerland and Italy saw an increase in activity last week. Many European countries have begun treating the virus as a part of daily life.

The public was urged not to leave Beijing last weekend after a new spike, and the city of Changchun was locked down.

Hong Kong has seen its worst spike in recent weeks after limiting COVID's spread for almost two years with some of the world's most stringent health mandates. More than one million infections and 4,200 deaths have been reported in Hong Kong in the past three weeks.

Will other variants emerge?

The more times a virus replicates, the more chances it has to evolve into a stronger strain.

Some public health experts are worried about the surge in Asia.

The emergence of new strains of virus in places that are experiencing major waves of omicron will be a worry for Daniel.

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This article was written by USA Today.

Scott has covered the COVID-19 epidemic. You can get unlimited access to the latest news about the impact of the Pandemic on New Jersey with a digital account.

You can email fallon@northjersey.com.

Newsfallon has a verified account.

The original article was published on NorthJersey.com: BA.2 variant: What to know about new omicron COVID strain.

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